Public health. What it is, what it does, how it works is changing daily. And Boston University School of Public Health (SPH)—ranked in the top ten schools of public health in the US—is at the frontier of that evolution, propelling public health into one of the most consequential careers of our times. As SPH defines it, public health encompasses all crucial human challenges, including the obesity epidemic, gun violence, poverty, infant mortality, LGBTQ rights, and human trafficking. If you want your own efforts to advance the world, public health is an exhilarating opportunity to do just that.